General MacArthur devised a bold plan to outflank the NKA forces and retake Seoul and cut off the NKA forces from their supplies lines from the north. This was the plan for the Inchon landings. Since the forces that comprised 10th Corps – the 1st Marine Division and the Army’s 7th Division – represented MacArthur lasts reserves, the initial reaction from the Joint Chief was skeptical since if the landings didn’t work out well, there were no more reserves to engage the NKA in theater. MacArthur convinced the Joint Chiefs and the Inchon landings took place with the U.N. forces rapidly moving inland and retaking Seoul. At virtually the same time, the forces in the Pusan Perimeter broke out and the U.N. forces drove the NKA all the way out of the South past the 38th Parallel. The question then was: Would the U.N. forces invade the North?